/* *, *:before, *::after {
    box-sizing: border-box;
} */

.div-center {
    margin-left: auto;
    margin-right: auto;
    border: 10px solid black;
    background: red;
    width: 120px;
    height: 120px;
    padding: 20px;
    text-align: center;
    box-sizing: border-box;
}
